choffel



C. CHOFFEL.

APPARATUS INTENDED TO PROJECT POWDER.

APPLICATION FILED APR. 13. I915.

Patented Aug. 26, 1919.

2 SHEETS-SHEET] W6 es W f z Tad/WW C. CHOFFEL.

APPARATUS INTENDED TO PROJECT POWDER. APPLICATION FILED APR-13.19%.

1 3 1 4, 387 Patented Aug. 26, 1919.

2 SHEETSSHEET 2.

@ ffizmv D UNITE STATES PATE GFFICE.

CHARLES CHOFFEL, F PARIS. FRANCE, ASSIGNOR TO LUCIEN FOUCAUD, 0F PARIS, FRANCE.

APPARATUS INTENDED TO PROJECT POWDER.

Application filed April 13, 1915.

To all whom it may concern:

Be it known that I, CHARLES CHoFFnL, citizen of the French Republic, residing at Paris, France, have invented certain new and useful-Improvements in Apparatus Intended to Project Powder, of which the following is a specification.

This invention relates to apparatus for projecting powder with the aid of compressed gas, and it has particular reference to fire extinguishers, its main object being to produce an apparatus of the character indicated more economically and in such a manner that its action may be more certain and more effective than hitherto.

According to the invention, the improved apparatus embodies a specially constructed container, which is equipped with injecting nozzles arranged in such a way that the jets of fluid have a whirling motion imparted to them, and the velocity of the fluid is caused to increase progressively until the discharge opening in the container is reached.

In the accompanying drawing:

Figure 1 is a side elevation, with parts broken away, of a portable fire extinguisher constructed accordlng to the invention.

Fig. 2 is a vertical section on line 22,

( Fig. 1.

Fig. 3 is a side elevation of a modification.

Fig. 4 is a cross section of Fig. 1 taken a}; a point slightly above the injecting nozz e.

Referring more particularly to said drawing, a indicates a strong sheet-iron casing of such a shape that its cross-sectional area decreases continuously from the top to the bottom of the casing; for example, the frustum of a cone. At its top, the casing is closed by means of a cover (1 which is welded or otherwise fixed thereto, while the bottom of the casing is furnished with a threaded ring or sleeve a likewise secured in place by welding, the said casing end or bottom being open to provide the discharge opening of the casing.

At about one-third way from the lower end or bottom of the casing, there is formed in the wall of the latter an aperture wherein is fixed a tubular iece b, of such dimensions that it can be introduced through said aperture into the casing. This tube 6 is provided near its center with a collar 6 which bears against the inner surface of thecasing wall, and its outer end is thread- Specification of Letters Patent.

Patented Aug. 26, 1919.

Serial No. 21,113.

ed, while its inner end terminates in a fork, the two members 6 of which have a slight downward inclination and form a double injecting nozzle. Retention of the aforesaid tube in the wall aperture is preferably effected by means of a nut c, which is threaded on the outer end of the tube and is adapted to be tightened against the casing wall, between which latter and the nut suitable packing is inserted.

To the outer end of the tube 6, there is connected, by means of a nut 6 a T-pipe d, the said nut b encircling the meeting ends of said tube and the stem of said pipe. The head or cross piece of this pipe 01 is provided with a needle valve and is attached to a carbonic acid bottle 6, (assuming, of course, that it is desired to make use of carbonic acid gas instead of some other gas). The said bottle is suspended from the casing a, and held in place thereon, by means of a ring f fixed to the casing.

A discharge nozzle 9 is threaded on the ring a", and is curved so as to dispose its free end y perpendicularly to the axis of the easing, said end 9 being preferably of conical formation. For fire extinguishers of large dimensions, the discharge nozzle has its free end made so that it can be connected to a hose 9, as shown in Fig. 3, in which case the apparatus is mounted upon a carriage 2', the latter having bearings 6 to receive trunnions a on the casing a. In the smaller sizes, leather straps h are provided to carry the apparatus.

To refill the casing a, it is only necessary to turn it upside down and remove the nozzle 9, and once filled, the apparatus is always ready for use. A stopper .9 may be inserted in the end of the nozzle to prevent escape of powder when the apparatus is not in action,

the stopper being withdrawn and the needle valve opened before commencing operation. When this has been done, the carbonic acid gas will pass under pressure from the bottle 6 into the casing through the nozzles 2*. The latter extend into the casing and are so arranged as to eject jets of compressed gas in a plane perpendicular to that portion of the opposite wall of said casing which is midway between the points toward which said nozzles are directed. The gas thus impinging aganist the casing wall is given a whirling motion, owing to the cross-sectional shape of the casing and to the arrangement of the nozzles as above specified and as a resuit, the two jets of gas describe two helices directed oppositely to each other, A very strong pressure for ejecting the powder is thereby developed in the casing; and by reason of the'gradual decreasing of the crosssectional area of the said casing or container toward the discharge opening therein, the compressed gas acts upon the contents of the container in such a manner that its velocity increases progressively until it reaches the discharge opening.

Having now particularly described and ascertained the nature of my said invention and in what manner the same may be performed, I declare that what I claim is:

1., An apparatus of the class described, comprising-a vertical container of regular conical form which continuously decreases in cross-sectional area from its upper to its lower end and which has a discharge opening at said lower end; and a pair of injecting nozzles in said container projecting slightly downwardly and arranged to eject 1 jets of fluid in a plane substantially transverse or the container and substantially per- 1 314.net?

ing nozzles in the body of said container above the lower end thereof said nozzles projecting slightly downwardly and arranged to eject jets of fluid in a direction substantially transverse to the container and substantially perpendicular to a plane tangent to the opposlte wall of said container at a point substantially midway between the points toward which said nozzles extend,

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

CHARLES CHQFFEL,

Witnesses:

- Penn Burm D. C, Poona, Jr.

all 

